公开(公告)号：US09000696B2

公开(公告)日：2015-04-07

申请号：US13800327

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Stephen James Sanchez ,  Marc John Kobayashi ,  Branislav Pjetar

IPC: H02P6/06 ,  H02P6/18

CPC classification number: H02P6/183 ,  H02P6/182

Abstract: The system discloses structure for synchronizing sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet DC motor. A drive voltage drives a plurality of the stator windings thereby producing a magnetic field. On an undriven stator winding among the stator windings, a voltage induced by the magnetic field is sampled. The induced voltage changes as a function of a magnetic rotor transitioning across a plurality of angular positions. A first value corresponding to the sampled voltage induced on the currentless winding is compared with a commutation threshold to determine a proper commutation point. The system is switched to a next drive configuration of the sequence when the first value surpasses the threshold.

Abstract translation: 该系统公开了用于在驱动多相无传感器无刷永磁直流电动机的一组定子绕组中使顺序相位切换同步的结构。 驱动电压驱动多个定子绕组从而产生磁场。 在定子绕组中的未驱动的定子绕组上，对由磁场引起的电压进行采样。 感应电压随着磁转子跨越多个角位置的转变而变化。 将与无电流绕组上感应的采样电压相对应的第一值与换向阈值进行比较，以确定适当的换向点。 当第一个值超过阈值时，系统切换到序列的下一个驱动器配置。

公开(公告)号：US20140312816A1

公开(公告)日：2014-10-23

申请号：US14208277

申请日：2014-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Branislav Pjetar ,  Marc J. Kobayashi

IPC: H02P6/12 ,  G01R31/34

CPC classification number: H02P6/12 ,  G01R31/343 ,  G01R31/42 ,  H02P6/182

Abstract: The system contains a controller unit comprising a memory device, a processing unit, and at least one analog-to-digital converter. A power stage has a plurality of switches, wherein the power stage receives a control signal from the control circuit and a power signal from a power source. The power stage drives two windings of the set of three stator windings to rotate a rotor and maintains one stator winding of the three stator windings undriven. The memory device stores a plurality of values for the driven current and a plurality of demodulated undriven winding voltages. The processing unit compares the plurality of values and periodically calculates a rotor sextant while the rotor rotates. The processing unit compares at least two demodulated undriven winding voltage values corresponding to at least two current values within the rotor sextant to calculate the rotor sextant parity and verify the calculation of the rotor sextant.

Abstract translation: 该系统包括控制器单元，其包括存储器件，处理单元和至少一个模拟 - 数字转换器。 功率级具有多个开关，其中功率级从控制电路接收控制信号和来自电源的功率信号。 功率级驱动三组定子绕组组合的两个绕组，以使转子旋转并维持三个定子绕组中的一个定子绕组未驱动。 存储器件存储驱动电流的多个值和多个解调的未驱动绕组电压。 处理单元比较多个值，并且当转子旋转时周期性地计算转子六分仪。 处理单元比较对应于转子六分仪内的至少两个电流值的至少两个解调的未驱动绕组电压值，以计算转子六分仪奇偶校验并验证转子六分仪的计算。

公开(公告)号：US09628002B2

公开(公告)日：2017-04-18

申请号：US14208277

申请日：2014-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Branislav Pjetar ,  Marc J. Kobayashi

IPC: H02P27/00 ,  H02P6/12 ,  G01R31/34 ,  H02P6/182 ,  G01R31/42

CPC classification number: H02P6/12 ,  G01R31/343 ,  G01R31/42 ,  H02P6/182

Abstract: The system contains a controller unit comprising a memory device, a processing unit, and at least one analog-to-digital converter. A power stage has a plurality of switches, wherein the power stage receives a control signal from the control circuit and a power signal from a power source. The power stage drives two windings of the set of three stator windings to rotate a rotor and maintains one stator winding of the three stator windings undriven. The memory device stores a plurality of values for the driven current and a plurality of demodulated undriven winding voltages. The processing unit compares the plurality of values and periodically calculates a rotor sextant while the rotor rotates. The processing unit compares at least two demodulated undriven winding voltage values corresponding to at least two current values within the rotor sextant to calculate the rotor sextant parity and verify the calculation of the rotor sextant.

公开(公告)号：US09088237B2

公开(公告)日：2015-07-21

申请号：US13827848

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Stephen James Sanchez ,  Marc John Kobayashi ,  Branislav Pjetar ,  John L. Melanson

IPC: H02P6/18

CPC classification number: H02P6/183 ,  H02P6/182

Abstract: A system for controlling motor switching in a sensorless BLDC having a stator with three stator windings and a permanent magnet rotor. The system includes a controller unit comprising a control signal generator, a memory device, a processing unit, a signal acquisition device, and an analog-to-digital converter. A power stage controlled by the controller unit has a plurality of switches and drives two windings of the three stator windings with a pulse width modulation signal and leaves one stator of the three stator windings undriven. The processing unit acquires a demodulated measured voltage on the undriven winding. The processing unit calculates a threshold at which the power stage will change which two windings of the three stator windings are driven when the demodulated measured voltage surpasses the threshold.

Abstract translation: 一种用于控制具有三个定子绕组的定子和一个永磁转子的无传感器BLDC中的电动机切换的系统。 该系统包括控制器单元，其包括控制信号发生器，存储器件，处理单元，信号采集器件和模数转换器。 由控制器单元控制的功率级具有多个开关并利用脉宽调制信号驱动三个定子绕组的两个绕组，并且使三个定子绕组中的一个定子不被驱动。 处理单元获取未驱动绕组上的解调测量电压。 当解调的测量电压超过阈值时，处理单元计算功率级将改变三个定子绕组的两个绕组被驱动的阈值。